More improvements for the crate publishing pipeline (#13153)

* more improvements for the crate publishing pipeline

* move default definitions to the publish-crates script

* add script to check the crate publishing pipeline at the start

* fix yaml references

* move more variables to .crates-publishing-pipeline

* separate .crates-publishing-pipeline from .crates-publishing-variables

* clean up redundant and unused code

substrate/scripts/ci/gitlab/pipeline/test.yml

@@ -14,7 +14,7 @@ find-fail-ci-phrase:
   script:
     - set +e
     - rg --line-number --hidden --type rust --glob '!{.git,target}' "$ASSERT_REGEX" .; exit_status=$?
-    - if [ $exit_status -eq 0 ]; then 
+    - if [ $exit_status -eq 0 ]; then
         echo "$ASSERT_REGEX was found, exiting with 1";
         exit 1;
       else
@@ -417,9 +417,14 @@ cargo-check-each-crate:
   parallel: 2
 
 publish-crates-locally:
+  stage:                           test
   extends:
     - .test-refs
     - .crates-publishing-template
+  # When lots of crates are taken into account (for example on master where all crates are tested)
+  # the job might take a long time, as evidenced by:
+  # https://gitlab.parity.io/parity/mirrors/substrate/-/jobs/2269364
+  timeout:                         4h
   script:
     - rusty-cachier snapshot create
     - git clone